<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
    <script type="text/javascript">
    function tulin(say){
      switch (say) {
        case '土豆':
        console.log('呦');
          break;
          case'呦':
          console.log('切克闹');
          break;
        default:
      }
      }

      tulin("土豆")
      tulin("呦")
      </script>
  </body>
</html>
